Danny, I'm glad to hear that you're enjoying your M22s. My experience with them over the past 6 months is similar to yours; what a terrific buy!
However, you appear to have bought in to the "low-fi/mid-fi/high-end" line, which, frankly, is nonsense. Your 8511 is excellent and assuming, as is highly likely, that it has adequate power for your room and listening level,no audible improvement will result from "upgrading". Consider spending your money on something that really makes a difference, such as lots more CDs and/or DVDs.
